From 7a1c7ed1b1c30ba4c668194a955fb414e471bade Mon Sep 17 00:00:00 2001
From: Kimplul <kimi.h.kuparinen@gmail.com>
Date: Sat, 1 Jun 2024 16:42:55 +0300
Subject: add sleep syscall

+ Sets the current core to sleep
---
 arch/riscv64/kernel/power.c | 6 ++++++
 arch/riscv64/kernel/sbi.h   | 6 ++++++
 2 files changed, 12 insertions(+)

(limited to 'arch/riscv64')

diff --git a/arch/riscv64/kernel/power.c b/arch/riscv64/kernel/power.c
index 49fc9c5..21e4957 100644
--- a/arch/riscv64/kernel/power.c
+++ b/arch/riscv64/kernel/power.c
@@ -49,3 +49,9 @@ stat_t poweroff(enum poweroff_type type)
 
 	return ERR_INVAL;
 }
+
+stat_t sleep()
+{
+	sbi_hart_stop();
+	return ERR_MISC;
+}
diff --git a/arch/riscv64/kernel/sbi.h b/arch/riscv64/kernel/sbi.h
index fe75c85..d536f58 100644
--- a/arch/riscv64/kernel/sbi.h
+++ b/arch/riscv64/kernel/sbi.h
@@ -149,6 +149,12 @@ static inline struct sbiret sbi_hart_start(unsigned long hartid,
 	                 0, 0, 0);
 }
 
+#define FID_HSM_STOP 1
+static inline struct sbiret sbi_hart_stop()
+{
+	return sbi_ecall(EID_HSM, FID_HSM_STOP, 0, 0, 0, 0, 0, 0);
+}
+
 /** Hart status function ID. */
 #define FID_HSM_STATUS 2
 
-- 
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